JSFiddle - React, Tailwind, and code Playground

JavaScript

function MyObject_1() {
	var instance_data = 100;
	this.getInstanceData = function() {
		return instance_data;
	}
	this.setInstanceData = function(v) {
		instance_data = v;
	}
}

void function() {
	var class_data = 5;
	this.getClassData = function() {
		return class_data;
	}
	this.setClassData = function(v) {
		class_data = v;
	}
}.call(MyObject_1.prototype);

var obj1 = new MyObject_1;
var obj2 = new MyObject_1;

obj1.setInstanceData(10);
console.log(obj2.getInstanceData());

obj1.setClassData(20);
console.log(obj2.getClassData());